On Fri, 2011-04-01 at 12:06 +0200, Alberto Luaces wrote: > > The gcc _OPENTHREADS_ATOMIC_USE_GCC_BUILTINS test should pass for both > > gcc 4.4.3 and 4.5.2. I used plenty of gcc versions prior to 4.4.3 and > > it worked fine. I'm currently using gcc 4.4.5 on this system and it > > pick up on _OPENTHREADS_ATOMIC_USE_GCC_BUILTINS fine. > > > > This make me wonder why your build with 4.4.3 isn't picking up on the > > atomic support correctly. Has anyone else had problems with picking > > up on the atmoic support? > > A reason can be the fact that some systems select different default > architectures. If you are using a 32 bit system instead of amd64, and > say your compiler is set by default to produce 586 or 686 compatible > binaries, chances are that the gcc builtins are deactivated. You would > have to specify the target architecture explicitly, > eg. -march=native. Those default configurations can be checked with `gcc > -v'.
Here's the output of the test from CMakeError.log: Performing C++ SOURCE FILE Test _OPENTHREADS_ATOMIC_USE_GCC_BUILTINS failed with the following output: Change Dir: /scratch/grahame/test/OpenSceneGraph-2.8.2-rc4/CMakeFiles/CMakeTmp Run Build Command:/usr/bin/gmake "cmTryCompileExec/fast" /usr/bin/gmake -f CMakeFiles/cmTryCompileExec.dir/build.make CMakeFiles/cmTryCompileExec.dir/build gmake[1]: Entering directory `/scratch/grahame/test/OpenSceneGraph-2.8.2-rc4/CMakeFiles/CMakeTmp' /opt/toolchain32/bin/cmake -E cmake_progress_report /scratch/grahame/test/OpenSceneGraph-2.8.2-rc4/CMakeFiles/CMakeTmp/CMakeFiles 1 Building CXX object CMakeFiles/cmTryCompileExec.dir/src.cxx.o /opt/gcc-4.4.3/bin/g++ -Wall -Wparentheses -Wno-long-long -Wno-import -pedantic -Wreturn-type -Wmissing-braces -Wunknown-pragmas -W unused -fpermissive -D_OPENTHREADS_ATOMIC_USE_GCC_BUILTINS -o CMakeFiles/cmTryCompileExec.dir/src.cxx.o -c /scratch/grahame/test/Op enSceneGraph-2.8.2-rc4/CMakeFiles/CMakeTmp/src.cxx Linking CXX executable cmTryCompileExec /opt/toolchain32/bin/cmake -E cmake_link_script CMakeFiles/cmTryCompileExec.dir/link.txt --verbose=1 /opt/gcc-4.4.3/bin/g++ -Wall -Wparentheses -Wno-long-long -Wno-import -pedantic -Wreturn-type -Wmissing-braces -Wunknown-pragmas - Wunused -fpermissive -D_OPENTHREADS_ATOMIC_USE_GCC_BUILTINS CMakeFiles/cmTryCompileExec.dir/src.cxx.o -o cmTryCompileExec -rdynami c gmake[1]: Leaving directory `/scratch/grahame/test/OpenSceneGraph-2.8.2-rc4/CMakeFiles/CMakeTmp' CMakeFiles/cmTryCompileExec.dir/src.cxx.o: In function `main': src.cxx:(.text+0x4c): undefined reference to `__sync_bool_compare_and_swap_4' src.cxx:(.text+0x78): undefined reference to `__sync_bool_compare_and_swap_4' collect2: ld returned 1 exit status gmake[1]: *** [cmTryCompileExec] Error 1 gmake: *** [cmTryCompileExec/fast] Error 2 It does seem the builtins are disabled. As Alberto said probably because they're not available for the default 32-bit compiler target, Here's the 'g++ -v' output: Using built-in specs. Target: i686-pc-linux-gnu Configured with: ./configure --prefix=/opt/gcc-4.4.3 --with-mpfr=/opt/mpfr-2.3.2 --enable-languages=c,c++,objc Thread model: posix gcc version 4.4.3 (GCC) Thanks for all the help! Cheers Grahame _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
